Shears.



Patented Sept. 5., |899.

G. F. JOHNSON.

SHEABS.

(Appugation 'mea nu. so, 1899.)

-(No Modal.)

NiTnD STATES PATENT Enron.

GSTAF F. JOHNSON, OF SUPERIOR, VISCONSIN, ASSIGNOR OF ONE-THIRD TO J. A.REN, OF SAME PLAGE.

SHEARS.

SPECIFICATION forming part of Letters Patent No. 632,267, datedseptember 5, 1899.

' Application filed March 30, 1899.

To all whom t may concern."

Be it known that I, GUsTAF F. JOHNSON, a citizen of the United States,residing at Superior, in the county of Douglas and State of Wisconsin,have invented a new and useful Shears, of which the following is aspecification.

This invention relates to shears or scissors; and the object of theinvention is to provide a simple and effective appliance of thischaracter wherein a large amount of power can be transferred from thehandle to what is for the time beingthe movable blade, and this resultcan be effected without exertion of undue effort upon the part of theuser and can be regulated to meet different conditions of work.

With these ends in view the invention consists in the novel combinationof elements and in the construction and arrangement of parts, which willbe hereinafter fully described and claimed.

To enable others to understand the invention, I have illustrated thepreferred embodi ment thereof in the accompanying drawings, formingapart of this specication, and in which# Figure l is a side elevation ofmy improved shears with the blades closed and with a portion of thecap-plate removed. Fig. 2 is a similar view with the cap-plate detachedand showing the upper blade open. Fig. 3 is a side elevation of theoffset, and Fig. 4 is a perspective View of the cap-plate.

Like characters denote like and corresponding parts in each of theseveral figures of the drawings.

In the drawings the lower or relatively stationary blade of the shearsor scissors is denoted by 2, and it has the usual handle 3, made in onepiece therewith, and the shank of the blade is provided with an oifsetor wingll, near one end of which the upper or swinging blade 5 ispivoted.

The upper blade is operated by the handle 6, which is pivoted to theoset 4, near the outer end thereof, and'which is adapted to fit againstthe handle 3 when the blades are closed together.

The movable blade 5 is provided at a point beyond its pivot with twoteeth 7, adapted to Serial No. 711,120. (No model.)

coperate with the three teeth 8 at the forward end of the handle 6, andthe intermediate member of the three teeth is disposed between the twoteeth, while the outer members thereof are adapted to engage the outerfaces of said two teeth on the motion of the handle, thereby through theintermeshing teeth to open or close the movable blade. The pivots forthe movable bladeand for the handle are 6o denoted, respectively, by 9and lO, and they consist, preferably, of screws in threaded engagementwith the offset 4, and the pivotscrews are adapted to enter thediagonallydisposed openings l2, formed, respectively, in the blade andhandle. In Fig. 2 the pivotpins are shown as being disposed in thelowermost openings of the two series; but the blade and the handle canbe so shifted as to introduce said pivot-screws into the upper 7oopenings, thereby to eifect changes inthe leverage exerted by the handleor to vary the position of the blade to take up wear in the same, fromwhich it will be evident that both the blade and the operating-handletherefor are adj ustably mounted. The lowermost opening in the handle 6is represented as being nearer the teeth on said handle than the upperor second opening, and when the pivotvscrew is introduced in the latterit will be evi- 8o dent that a decreased leverage will be applied, butit will not be of any great extent, as both of the openings are arrangedadjacent to the teeth, whereby pressure upon the end ofthe handle willresult in apply-in g increased power to the movable blade.

The blades may be made of any suitable material, and the lower bladewill be made narrow and will have an acute point,fso as not to elevatethe cloth or other material be- 9o ing cut too high from its support.The intermeshing teeth 7 and 8 are protected by the cap-plate 13, whichhas anges 14:l along its opposite edges and extending laterallytherefrom, one of said flanges fitting against the offset et and theother flange enga-ging in a mortise in the under side of the lowerblade, the edges of said last-mentioned parts being flush. The plate 13is held in place by the screws 9 and 10, whichjoin the blade 5 and roothe handle G to the odset 4:.

The cap-plate 13 has a recess l5 near the lower forward corner thereof,which is adapted to receive the cloth, and the upper wall of the recessconstitutes a shoulder for pressing down upon the cloth to be cut,thereby to lct .the shears or scissors pass free thereof, and

, shears or scissors.

Shears or scissors constructed as hereinbefore described are efficientin operation, consist of a small number of parts, and the power exertedby the blade is considerable by reason of the increased leverage appliedby the handle, although the labor involved in operating the handle iscomparatively small.

The cap-plate 13 has a hole 2O over the intermeshing teeth to receiveoil for the purpose of lubricating said teeth.

It will be observed that the edges of the interineshing teeth 7 and 8touch a straight line and that said teeth are relatively long, so thatwhen the blade and the handle are either or both of them shifted in themanner hereinbefore set forth the teeth will still remain in mesh,whereby the power can be transferred from the handle to the blade.

Changes in the form, proportion, size, and the minor details ofconstruction within the scope of the appended claims may be resorted toWithout departing from the spirit or sacrificing any of the advantagesof this invention.

Having thus described the invention, what I claim is l. In a device ofthe class described, the combination with a fixed blade having a handle,of a movable blade pivoted thereto, a movable handle also pivotedthereto, said movable parts havin gintermeshing teeth, and means foradjusting the pivotal connections of the :movable parts to have fixedpositions with respect thereto.

2. In a device of the class specified, the combination with a fixedblade, of a movable blade pivoted thereto and having teeth, a handlealso pivoted to the blade and provided with teeth meshing with saidfirst-mentioned teeth, the pivotal connections of the movable partsbeing adjustable to have 'fixed positions Vwith respect thereto and acap-plate for protectin g said teeth said cap-plate being secured inplace by the pivots that imite the movable blade and its handle to thefixed blade, substantially as described.

3. 4In a device ot' the class described, the combination with a iixedblade having a handle, of a movable blade pivoted thereto, a movablehandle also pivoted thereto, said movable parts having relatively longintermeshing teeth, the edges of Which touch a. Vstraight line, andmeans foradj usting the pivotal connection of the movable parts to -havefixed positions with respect thereto.

4c. In a device of the class specified, the com bination of a fixedblade having an oifset,

vof a movable blade having relatively long teeth and having a series ofopenings, a han-f dle also pivoted to the ,blade and provided withrelatively long teeth located to mesh with said first-mentioned teethand also havingv a series of openings, pivots adapted to pass throughthe openings in the blade and the handle respectively and to be seatedin said offset, and a cap-plate adapted to cover the intermeshing teethand having an oil-receiving opening adjacent to said teeth,substantially as described.

5. In a device of the class specified, the combination with a fixedblade provided with an offset having a recess near one corner, of amovable blade having relatively long teeth and having a series ofopenings, a handle also pivoted to the blade and provided withrelatively long teeth located to mesh with said firstmentioned teeth andalso having a series of openings, pivots adapted to pass through theopenings in the blade and the handle respectively and to be seated insaid oifset, and a cap-plate adapted to cover the intermeshing teeth andhaving an oil-receiving opening adjacent to said teeth, and saidcap-plate having a recess near one corner thereof, substantially asdescribed.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two Witnesses.

GUSTAF F. JOHNSON.

Vitnesses:

HENRY J. JORDAN,

EYnoN T. RANDALL.

